The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 30, 2012
Filed:
Mar. 28, 2006
Takuya Morimoto, Itano-Gun, JP;
Ryuji Ohshita, Tokushima, JP;
Takuya Morimoto, Itano-Gun, JP;
Ryuji Ohshita, Tokushima, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
A spiral electrode rectangular battery has a first electrode plate and second electrode plate, which are the positive and negative electrodes, laminated together with a separator sandwiched in between, rolled into an electrode unit, and housed in an exterior casing. The electrode unit has flat surfaces on opposite sides, and edges on both sides of those flat surfaces are curved with a prescribed radius of curvature to form rounded edge regions. The first and second electrode plates are wound around flat surfaces and rounded edge regions in a continuous fashion, and the end of the outer-most electrode plate is disposed at a rounded edge region. In addition, corner cuts are provided to truncate corner regions formed between the edges at both sides and the end of the outer-most electrode plate.